Valve for lifting devices



June 17, 1930. I J, coa I 1,764,004

VALVE FOR LIFTING DEVICES Filed May 16, 1927 2 Sheets-Sheet 1 IN VENTOR.

ZZIi-IYD- COCHIIY A TTORNEYQ Patented June' 17, 1930 UNITED STATES JOHND. COCHIN, OF SAN FRANCISCO, CALIFORNIA VALVE FOR LIFTING DEVICESREISSUED" Application filed May 16, 1927. Serial No. 191,579.

This invention relates to improvements in valves adapted for use withlifting devices. An object of my invention is to provide a valve forcontrolling the movement of a lifting device whereby a vehicle may beelevated above the ground to enable the underneath portion of thevehicle to be readily accesslble for the purpose of repairing or'cleanlng the same.

Another object of my invention is to provide an improved valve for usewith apparatus for elevating automobiles or other objects above thesurface of the ground, in which is embodied suitable means for safelymaintaining the load at any desired height.

Another object. of my invention is to provide an improved valve for'usewith apparatus for elevating a load above the ground, which serves as asuitable means for instantaneously stopping the upward movement of thelifting part of the apparatus.

,Other objects more or less apparent will present themselves or will bespecifically pointed out in the description to follow.

In the accompanying drawings:

Fig. 1 is a side elevation of apparatus used for elevating vehicles orother objects wlth which my invention may be used;

Fig. 2 is a top plan view of my improved regulating valve;

Fig. 3 is a sectional view taken on the line 33 of Fig. 6;

Fig. 4 is a vertical sectional view taken on the line 44 of Fig. 2;

Fig. 5 is a vertical sectional view taken on the line 55 of Fig. 2;

Fig. 6 is a side elevation of the regulating valve; and

Fig. 7 is a vertical sectional view taken on the line 77 of Fig. 2.

Referring to the drawings, the numeral 1 represents a cylindrical shapedcasing having its lower end closed by a bottom plate 2, its upper endprovided with a re-enforcing ring 3, and its inside circumferentialsurface provided with a plurality of vertically extending grooves.Movably located inside the casing 1 and the ring 3, with itscircumferential surface movably contacting with the inside surface ofthe casing, is a ram 4 which has a rack 5 secured to its upper end. Thecasing 1 and the ram 4 are placed in operating position beneath thesurface of the ground or floor, with the rack 5 suitably projectingabove the ground so as to engage with the underneath part of a vehicleor other load to be elevated.

Extending through the ring 3 to the inside of the casing 1, is a pipe 6which is adapted to carry oil to the inside of the casing for thepurpose of elevating the ram. The oil, dev livered under pressure to theinside of the", casing by the pipe 6, is forced downwardly inside thegrooves located in the wall of the casing, and it thereafter exertssufficientpres- 5 sure on the bottom of the ram 4 to force it and theload located on the rack 5 in an upward direction. i

The pipe 6 is suitably connected at its op-. posite end to a controlvalve 7 which is adapted to deliver oil with suflicient pressure toelevate the ram 4. Connecting the control valve 7 and an oil containingtank 8 is a pipe 9 which is adapted to carry oil from the 'said tank tothe said control valve. 5

Connecting the tank 8 and the control valve 7 7 is a pipe 10 which isadapted'to carry compressed air from the control valve to the tank.Leading from a source for supplying a quantity of compressed air, andsuitably connected to the control valve 7 is a pipe 11 which is adaptedto deliver sufficient quantities of compressed air for the satisfactoryoperation of the apparatus. The control valve is enclosed by a casing 12having openings 13, 14, 15, 16 and 17 therein through which a quantityof compressed air and oil may enter the casing and pass therefrom. Thepipe 6 is connected to the casing at opening 15 through suitable threadslocated on the inside surface of the walls of the opening, while theother oil pipe 9 is similarly connected to the casing at opening 13. Thepipe 11 which furnishes quantities of com ressed air for the operationof the device, 1s connected to the casing at opening 14 through suitablethreads located on the inside surface of the walls of the opening, whilethe other compressed air carrying pipe 10 is similarly connected to thecasing at s tom of the caps 18 and the underneath side of valve heads 21are spiral springs 22 which tend to force the valve heads upwardly andkeep them seated on their valve seats, as will be later described.

Removably screwed into the bottom of the casing 12 are two caps 23having cylindrical shaped supports 24 extending vertically therein.Movably located in the supports 24 are valve stems 25 which carry valveheads 26, and extending around the said supports 24 with their endscontacting with the bottom of the caps 23 and the underneath side of thevalve heads 26 are spiral springs 27 which tend to force the valve headsupwardly and keep them seated on their valve seats, as will be laterdescribed.

Extending downwardly and horizontally inside the casin 12 from the topthereof above the valve eads 21 is a U-shaped partition member 28 havingholes therein which provide seats for the valve heads 21, and oining thepartition plate with the bottom of the casing is a vertically extendingwall 29 which is located between the two valve stems 20. 1 Extendingvertically from the top to the bottom of the casing 12 and disposed in aparallel plane to the axes of the openings l3 and 15, is a partition 30,which has an edge of the U-shaped partition member 28 secured thereto. Achamber is thereby provided which is surrounded by the top of the.

partition member 28, the top of the casing 12, one of the sides of thecasing and the partion 30. -Two chambers are also provided immediatelybeneath the valve heads 21, one of which connects with the opening 13and j the other with the opening 15.

Extending from the bottom of the casing 12 in an upward and horizontaldirection with its edges secured to the partition 30 and a side of thecasing, is a U-shaped partition member 31 which encloses a chamberlocated around one of the valve stems 25, and which is provided with ahole that forms a seat for one of the valve heads 26.

Extending from the top of the casing 12 in a downward and horizontaldirection with its edges secured to the partition 3 and a side of thecasing, is a partition member 32 which encloses a chamber located aboveone of the valve heads 26, and which is provided with a hole that formsa seat for the said valve head. The partition members 31 and 32, a

The said pins extend movably through the said lugs and nuts, and areadapted to be forced downwardly by a lever member 37 which is pivotedabove the casing on a pin 38 which extends through the said member and aprojection 39 located on the top .of the said casing. The lever 37 isprovided with an operating handle 39 and is so positioned on the casingthat when it is moved inone direction it presses against two of the pins33 located above one of the valve heads 21 and one of the valve heads26, thereby causing the said valve heads to open, and when it is movedin the opposite direction it presses against the other two pins 33 whichare located above the other two valve heads 21 and 26, thereby allowingthe first two mentioned valve heads to close and causing the last twomentioned valve heads to open.

In operation, the handle 39' upon being moved toward the opening 13causes the lever member 37 to move on its pivot and force two of thepins 33 downwardly, thereby causing the valve heads 26 and 21 which arelocated adjacent openings 14 and 13 to become unseated. A quantity ofcompressed air supplied by the pipe 11 enters the casing 12 through theopening 14 and passes upwardly through the hole located in the partitionmember 31, around one of the valve heads 26, and out through the opening17 into pipe 10, which delivers it to the tank 8. The com pressed air soentering the tank forces a quantity of oil located therein through thepipe 9, from which it is delivered to the inside ofthe casing 12 throughopening 13. The oil entering the casing passes upwardly around the valvehead 21 which has been forced downwardly by a pin 33, and through theopened hole located in the'partition member 28. The said oil thereafterproceeds to the part of the chamber located'above the other valve head21, and forces the said valve head downwardly, after which it passesthrough the hole in the partition member 28 located adjacent the saidvalve head, and out through opening 15 into the pipe 6. The

pipe 6delivers'the oil to the casing 1, after which it proceeds to thebottom thereof After the ram has been so elevated, the same may belowered by moving the handle 39' in the opposite direction to thatpreviously indicated. Upon moving the handle 39' toward the opening 15the valve head 26, the valve heads 21 and 26 which were not previously,by the first described movement of the handle, forced open by the pins33, are now pressed downwardly by the said pins, thereby allowing thecompressed air located in the valve 7 to pass upwardly through the holein the partition member 32 and escape through the opening 16 located inthe casing 12. The valve head 21 located adjacent the opening 15 isforced downwardly, and the oil heretofore located in the casing 1 isforced through the pipe 6 by the load on the ram,

and into the casing 12 through the opening 15 located therein. The oilso coming back into the casing 12, passes upwardly around the valve head21', through the opening located in the partition member 28; thereafterforcing the other valve head 21 downwardly and passing through the otheropening in the partition member 28, from whence it proceeds through theopening 13 and pipe 9 back into the tank 8.

Although I have described my invention with considerable detail it isapparent to those skilled in-the art that the same may be embodied inother forms having similar constructions and similar modes of operation.I therefore do not desire my invention confined to the exactconstruction shown and described but desire it to be included broadlywithin the spirit of the appended claims.

Having described my invention, what I claim is:

1. In a control valve, a casing having a plurality of openings in itssides, a vertical partition extending from the top to the bottom of thecasing, a longitudinally'extending partition located at one side of thevertical partition between the top and bottom of the casing and having aplurality of openings therein, a plurality of partitions located in thecasing at the opposite side of the vertical partition, each having anopening therein, and means movably associated with the openings in thepartitions for closing and opening the said openings therein,

(whereby-quantities of compressed air and liquid may be allowed to passthrough the casing in certain directions at given times.

2. n a control valve, a casing having a plurality of openings in itssides, a vertical partition extending longitudinally through the casing,a plurality of horizontally disposed partitions located in the casing atthe sides of the vertical partition, whereby the.

' 3. In a control valve, a casing having a. plurality of openings in itssides, a vertical partition extending longitudinally through the casingfrom the top to the bottom thereof, a plurality of partitions located inthe casing with edges thereof secured to the vertical partition, wherebya plurality of passageways communicating with the openings in the casingare formed inside the easing, and means for controlling the movement ofcompressed air and liquid through the passa eways.

4. n a control valve, a casing having a plurality of openings in itssides, a partition extending longitudinally through the casing and fromthe top to the bottom thereof, a plurality of partitions located in thecasing at the sides of the first mentioned artition having openingstherein which a ow quantities of liquid and compressed air to pass fromone side of each of the last named partitions to its 0 posite side, andmeans for closing certain o the openings in the artitions and' openingothers by one an the same operation.

5. In a control valve, a casing having a plurality of openings therein,a vertical partition extending lengthwise through the casing from thetop to the bottom thereof, a horizontal partition located in the casingat one side of the vertical partition and having an opening therein, aplurality of partitions located in the casing at the other side of thevertical partition, each of which has an opening therein, a plurality ofvalve heads movably associated with the openings in the partitions, aplurality of pins movably supported by the casin and in contact with thevalve heads, an a lever member movably mounted on the casing, which saidmember is adapted to be moved in certain directions against certain ofthe pins at certain times, whereby certain of the valve heads may beremoved from the openings in the partitions at certain times.

6. In a control valve, a casing having a plurality of openings therein,a partition extending from the top to the bottom of the casing, ahorizontal partition located at one side of the first mentionedpartition, a plurality of horizontal partitions located at the oppositeside of the said first mentioned partition, the said horizontalpartitions having openings therein, means associated with the openingsin the partitions for opening and closing the same, and means foractuating the first mentioned means.

JOHN D. COCHIN.

casing is divided'into a plurality of chambers and means-located in thehorizontal partitions for allowing compressed air and liquid to flowthrough the casing in certain directions at certain times.

